出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/04/17 14:18 UTC 版)
Boron trioxide (or diboron trioxide) is one of the oxides of boron. It is a white, glassy solid with the formula B2O3. It is almost always found as the vitreous (amorphic) form; however, it can be crystallized after extensive annealing. It is one of the most difficult compounds known to crystallize.